Cold Laser

What is Cold Laser?

Also called Low Level Laser or photobiomodulation, this laser is not really cold, but instead it is of lower power than the kind of laser that can heat or cut. Cutting lasers have about 5 watts of power but our cold laser is only 100 milliwatts – below the intensity where heat is produced. This is more powerful than some cold lasers, but research has shown that this is the ideal strength to optimize results. This is called a 3b laser power from 5-500 mW. Some clinics use class 4 laser which we avoid because of their potential to burn. Some use 3a (less than 5mW) but we feel these are underpowered relative to our laser. The laser used by our office is made by Weber, one of the leaders in the field.


Treatment is performed by attaching 4 small pads with lasers to the skin so that the lasers are pointed directly downward against the skin. The treatment lasts for 20 minutes of continuous light. There is no pain, no heat and no side effects from the treatment. During the treatment, patients describe that they can feel the effects of the laser.


Results from the treatment are usually seen shortly after the treatment is completed. Research has shown that the laser treatment can decrease pain, improve joint range of motion and improve nerve function.

How does Cold Laser work?

Research from a Harvard at their Wellman Center for Photomedicine at the Massachusetts General Hospital indicates that laser light can stimulate ATP, nitric oxide production and has other biologic effects. This has a natural anti-inflammatory effect. Laser can also work like acupuncture without needles to stimulate the acupuncture meridians. There is evidence to suggest that this stimulates the parasympathetic nerves which can directly produce decreased inflammation. Low level laser can also increase blood flow, energy production and myriad other cellular functions.

Here* is an excellent paper reviewing how it works. *MOJ Orthop Rheumatol. 2015; 2(5): 00068. The Use of Low Level Laser Therapy (LLLT) For Musculoskeletal Pain. Howard B Cotler, Roberta T Chow, Michael R Hamblin, and James Carroll


  • BACK AND NECK PAIN: especially useful here with roughly 80% of patients obtaining relief
  • MUSCULAR PAIN: Usually effective for chronic muscle pain and tightness
  • JOINT PAIN: Surface pads are not usually effects for large joint (e.g. knee, shoulder) arthritis, but a study at our center recently presented at a prestigious national meeting has shown that needle probes into the joint combined with Platelet Rich Plasma are often effective for joint arthritis when other treatments have failed
  • HEADACHES: It relieves headache pain in most patients. We see headaches in conjunction with neck pain and also TMJ pain
  • TMJ: We have found Low level laser to provide some relief to most of our TMJ patients, probably relieving masseter muscle spasm without the need for injections

Types of Laser Light

Typically Red and Infra-Red wavelengths are used. We are one of the few centers to also have available Blue and Yellow lasers. Emerging research has shown improved efficacy for some wavelengths in specific problems. Intravenous laser treatment also shows promise in decreasing generalized inflammation.

  • American Academy Regenerative Medicine
  • American Academy and Board of Regenerative Medicine
  • American Orthopaedic Society for Sports Medicine
  • isakos
  • Rush University Medical Center
  • American Association of Nurse Anesthetists
  • American Academy of Orthopaedic Surgeons
  • European Society of Sports Traumatology, Knee Surgery Academy
  • International Cartilage Repair Society